Fuel feeder or stoker for furnaces.



No. 835,952 PATENTED NOV. 13, 1906. J. vT. JENKNS L E. THAGKWLL. FUEL FEEDER 0R STOKER POR PURN'AGBS.

'PLIGATION FILED 0CT.Z8,1905.

2 SHEETS-SHEET 2V ATTORNEY Um TED sTATEs 'JOHN r. JENKiNs AND EDWARD TEAcKwE-LL, or AssieNoRs oF ONE-THIRD To EDWARD H. vAUei- 'or OHO.

FUEL FEEDER on STOKER Fon FURNAES,

T0 (all 107mm/ it muy concern.'

Be it known that we, JOHN T. JENKINS and EDWARD THAcKwELL, citizens of the United States, and residents of Massillon, in

the count;-v of Stark and State of Ohio, have.

invented a new and Improved Fuel-Feeder or Stoker for Furnaces, of which the following is a full, clear, and exact description. This invention relates to improvements in puddling, scrap, and heating furnaces used in iron andsteel mills and particularly to a Stoker employed in connection therewith, the object being to provide a simple and novel stoker by the means of which the coal will be evenly distributed. Other objects of the invention will appear in the general description. We will describe a furnace embodying our invention and then point out the novel features in the appended claims.

Reference is to be had to the accom anying p drawings, forming a part of this speci ication,

in which similar characters of reference indihas a pitman connection 29 with a crank 30 cate corresponding parts in both figures.

Figure 1 is a plan, partly in section, on the line :c of Fig. 2, of furnace embodying our invention. 2 is a longitudinal vertical section thereof.

The furnace comprises the usual ends, side, and top walls 1, arranged within which is a bridge-wall 2, and rearward of the bridgewall is the hearth 3. Forward of the'bridgewall 2, and consid erablv below the plane thereof, is a stcking-chamber 4, into which coal is forcedby a mechanism to be hereinafter described. Arranged around the upper edge of the striking-chamber is framelike lsteam-receiving chamber 5, having perforationsV 6 in its top f or the outlet of steam, and at the sides of this steam-chamber 5 are the fuel-supporting plates 7, which instead of be.- ing in grate form are solid. At the inner edges or at the edges adiacentv to the steamchamber 5 vthe plates 7 have trunnion-bearings in a frame 8, seated in the furnace-walls, the forward trunnions being tubular and these tubular trunnions communicating with hollow portions 1() of the fuel-supporting plates, the upper walls of these tubular portions being provided with perforations 11. for the outlet of air to mingle with. steam to promote combustion, as will be hereinafter described. Bv employing these fuel-support- Specification of Letters Patent.

Application filed Octhber 28, 1905. Serial No', 284,886

PATENT oEEroE.

Patented? Non.

ing plates the fuel is held until ,entirely re'- duced to ashes, which maybe 'd'urnpedfinto the ash-pits by turning 4the said'plates ownward. ed for turning the plates. An. p r-s n pipe 13 has branches 14 commun -irig with the tubular trunnions', and in"'thi"s air-'supply pipe l?) is a .regulating slide-valve 1l5 ,"`f+hich mav be operated by any" suitablefmeansL` through the side wallsfof thefurnfce-isqa steam-superheater con sisting boxing 16, which at one end has'anfinletl pipe l1 7"for steam, and at the lothe'rfend"thereis inouton a crank-'shaft 31, and the plunger 26 has a pitman connection 32 with a crank 33 on said crank-shaft. The crank-shaft magT be driven by' any desirable means but we here show it as provided with a bevel-gear 84, engaging with a bevel-gear 35 on a driving-shaft 36. The passages 27 and 28 have openings 37, which communicate with a feed-chamber 38, into which coal is feived from a hopper 39. The passage of coal through the chamber 38 may be controlled or entirelyT cut off by means of a slide-valve 40, movable through an opening in the front wall of the chamber and having studs at its ends, which engage in slots the lower ends of these'levers are segmentracks 42, which mesh with racks 43, the said racks beingengaged by pinions 44 on a shaft 4.5, to which, as here shown, is'attached an \operating bami-wheel 46. While this handwheel is arranged close to one of the racks or to may be extended so that the hand-wheel may be located at any desired distance.

In the operationsteam and air will be admitted through theparts heretofore described,

into the fuel will cause a thorough and comlplete combustion and burning of the fuel.

Any suitable means'may be' m" formed in the upper ends of levers 41, and on the furnace, it is obvious that the shaft 45 and the mingling steam and air by passing' Extending through the lbridge walha'ndv let-pipe 18, havingk branches V1'Q,Elea-dingint() This is especially so because of the inlet ofisu-l perheated steam. It will he noted thaty the cranks 30 and 33 extend in opposite directions, so that the plungrs are operated in op- 5 posite directions. Therefore, when the plungers are forced into the stoling-charnher the coal therein will be forced bj; the fresh suppl`v injected onto the fuel-supporting plates 7.

It is obvious that the invention may he used in connection with anv forni of furnace, and, therefore, We do not liinit the saine to t-he particular furnace here shown.

Having' thus described our invention, we claim as new and desire to lsecure hy Letters x5 Patentl 1, A furnace having a stoling-chainher from which passages lead outward through' the'front Wallof the furnace, plungers for operating in said passages, the said passages 2o having openings at the top connnnnicating -With a feedcha1nber near the front wall of the furnace, a hoppei` connecting with said feed-chamber, a' regulating-valve for operating in the feed-chamber, levers connecting with the valve,' segment-racks on said levers,

shaft, and pinions on the shaft engaging with ing with a' feed-chamber, a hopper leading into the feed-cliainber-,a plate-valve movable in the feed-chamber, levers with which said 35 valve connects, segment-racks on the lower ends lot 'said levers, horizontally-movable rar-lis eni-ggatging with said segment-racks, a

sai-d horizontally-movable racks.`

in testimony` whereof we have signed our naines to this specification 1n the presence of two sulxscrihing witnesses. f

JOHN T. JENKINS.

his EDWARD THACKWELL.

niark SSQS l Y la i me hassen,

JOHN C.' GMTHER. 

